Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint already establishes that this is a safe read operation, and the description adds that it scans and reports signal strength. It does not mention scan duration, hardware/driver requirements, or potential permission prompts, so it adds only moderate behavioral context beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.